Home / 142,986.72-197,299.44-81,732

Finding the Fourth Proportional to 142,986.72, 197,299.44 and 81,732

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Solution

The fourth proportional to 142,986.72, 197,299.44 and 81,732 is: 112,777.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,986.72 : 197,299.44 = 81,732 : x
  2. Step 2: Convert to fraction form
    142,986.72/197,299.44 = 81,732/x
  3. Step 3: Cross multiply
    142,986.72x = 197,299.44 × 81,732
  4. Step 4: Simplify right side
    142,986.72x = 16,125,677,830.08
  5. Step 5: Solve for x
    x = 16,125,677,830.08/142,986.72
  6. Step 6: Final answer
    x = 112,777.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.